The feet to inches conversion factor
One foot equals exactly 12 inches, so to convert feet to inches you multiply by 12: inches = ft × 12. For example, 5 ft × 12 = 60 inches. To go the other way, use the inches to feet calculator.
The relationship is exact by definition, so nothing is rounded away: both units are tied to the international inch of 25.4 mm, which makes one foot exactly 304.8 mm or 30.48 cm. That is why feet-to-inches answers are always whole numbers when the input is a whole number of feet.
Worth having open at the same time: the cm to inches calculator.
How to convert feet to inches
Enter a length in feet and the calculator multiplies by 12 to return inches. This is handy for height, lumber, and fabric. Decimal feet such as 5.5 are supported and convert to 66 inches.
Decimal feet and feet-and-inches notation are not the same thing. 5.5 ft means five and a half feet, or 66 inches, while 5′5″ means five feet five inches, or 65 inches. Convert the fractional part before you type: 5′6″ is 5.5 ft and therefore 66 inches, but 5′3″ is 5.25 ft, or 63 inches.
If the next number you need is a related one, the feet to meters calculator covers it.
Feet to inches reference table
| Feet | Inches |
|---|---|
| 1 ft | 12 in |
| 3 ft | 36 in |
| 5 ft | 60 in |
| 10 ft | 120 in |
Reference points make the table easier to use: 5 ft 4 in is 64 inches, 5 ft 10 in is 70 inches and 6 ft is 72 inches. A standard interior door is 80 inches tall (6 ft 8 in), and a 4 × 8 ft sheet of plywood measures 48 × 96 inches.
A quick pass through the feet to yards calculator saves a step later on.
Frequently asked questions
- How many inches is 5 feet?
- 5 feet equals 60 inches (5 × 12).
- What is the feet to inches formula?
- inches = feet × 12, since 1 foot is exactly 12 inches.
- How many inches are in a foot?
- There are exactly 12 inches in one foot.
- How do I convert inches back to feet?
- Divide inches by 12, or use the inches to feet calculator.
- How do I convert 5 ft 9 in to inches?
- Multiply only the feet by 12, then add the loose inches: 5 × 12 = 60, plus 9 gives 69 inches. The classic mistake is entering 5.9 and multiplying that by 12, which returns 70.8 inches — a completely different length.